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arguments in run() are now optional (I think we should remove them altogether - it's too error prone and is clearly not necessary) + fallback on os.system() if no socket is provided. One more nice idea from Fabrice :-)

compatibility with print() - one more nice idea from Fabrice ;-)

make bezierBasis independant from declaration of element tag in GmshDefines.
move static methods getTag(..) & **FromTag(..) from MElement to ElementType.
completely revert to double for monomials.